<template>
   <div class='login_container'>
     <!-- 登陆组件 -->
     <div class="login_box">
       <div class="avatar_box">
         <img src="../assets/logo.png" alt="">
       </div>
       <!-- 登陆表单区 -->
       <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
         <!-- 用户名 -->
         <el-form-item prop="username">
           <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
         </el-form-item>
         <!-- 密码 -->
         <el-form-item prop="password">
           <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
         </el-form-item>
         <el-form-item class="btns">
           <el-button type="primary" @click="login">登录</el-button>
           <el-button type="info" @click="resetLoginForm">重置</el-button>
         </el-form-item>
       </el-form>
     </div>
   </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登陆表单的数据绑定对象
      loginForm: {
        username: '',
        password: ''
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
      // this指向登陆组件的实例对象
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败！')
        this.$message.success('登陆成功！')
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang='less' scoped>
.login_container{
  background-color: #2b4b6b;
  height:100%
}
.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}

.avatar_box{
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position:absolute;
  left: 50%;
  transform: translate(-50%,-50%);
  background-color: #fff;
  img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
  .btns {
    display: flex;
    justify-content: flex-end;
  }
  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
</style>
